<template>
  <div id="detail">
    <!-- 导航栏 -->
    <detail-nav-bar
      class="detaik-nav"
      @titleClick="titleClick"
      ref="nav"
    ></detail-nav-bar>
    <scroll class="content" ref="scroll" :probeType="3" @scroll="contentScroll">
      <detail-swiper :top-images="topImages"></detail-swiper>
      <detail-base-info :goods="goods"></detail-base-info>
      <detail-shop-info :shop="shop"></detail-shop-info>
      <detail-goods-info
        :detail-info="detailInfo"
        @imageLoad="imageLoad"
      ></detail-goods-info>
      <detail-param-info
        ref="params"
        :param-info="paramInfo"
      ></detail-param-info>
      <detail-comment-info
        ref="comment"
        :comment-info="commentInfo"
      ></detail-comment-info>
      <goods-list ref="recommend" :goods="recommends"></goods-list>
    </scroll>

    <detail-bottom-bar @addCart="addToCart"></detail-bottom-bar>

    <back-top v-show="backFlag" @click.native="backClick"></back-top>

    <toast :message="message" :show="show"></toast>
  </div>
</template>

<script>
import DetailNavBar from "./childComps/DetailNavBar.vue";
import DetailSwiper from "./childComps/DetailSwiper.vue";
import DetailBaseInfo from "./childComps/DetailBaseInfo.vue";
import DetailShopInfo from "./childComps/DetailShopInfo.vue";
import Scroll from "../../components/common/scroll/Scroll.vue";
import DetailGoodsInfo from "./childComps/DetailGoodsInfo.vue";
import DetailParamInfo from "./childComps/DetailParamInfo.vue";
import DetailCommentInfo from "./childComps/DetailCommentInfo.vue";
import GoodsList from "../../components/content/goods/GoodsList.vue";
import DetailBottomBar from "./childComps/DetailBottomBar.vue";
import BackTop from "../../components/content/backTop/BackTop.vue";

import {
  getDetail,
  Goods,
  getRecommend,
  Shop,
  GoodsParam,
} from "../../network/detail";
import { itemListenerMixin } from "../../common/mixin";
import { debounce } from "../../common/utils";

import { mapActions } from "vuex";
import Toast from "../../components/common/toast/Toast.vue";

export default {
  name: "Detail",
  components: {
    DetailNavBar,
    DetailSwiper,
    DetailBaseInfo,
    DetailShopInfo,
    Scroll,
    DetailGoodsInfo,
    DetailParamInfo,
    DetailCommentInfo,
    GoodsList,
    DetailBottomBar,
    BackTop,
    Toast,
  },
  mixins: [itemListenerMixin],
  data() {
    return {
      iid: null,
      topImages: [],
      goods: {},
      shop: {},
      detailInfo: {},
      paramInfo: {},
      commentInfo: {},
      recommends: [],
      themeTopYs: [],
      getThemeTopY: null,
      currentIndex: null,
      backFlag: false,
      message: "",
      show: false,
    };
  },
  created() {
    // 1.保存传入的iid
    this.iid = this.$route.params.iid;

    // 2.根据iid请求详情数据
    getDetail(this.iid).then((res) => {
      // console.log(res);
      // res中转
      const data = res.result;
      // 1.获取顶部轮播数据
      this.topImages = data.itemInfo.topImages;

      // 2.获取商品信息
      this.goods = new Goods(
        data.itemInfo,
        data.columns,
        data.shopInfo.services
      );

      // 3.创建店铺信息对象
      this.shop = new Shop(data.shopInfo);

      // 4.保存商品的详情数据
      this.detailInfo = data.detailInfo;

      // 5.获取参数信息
      this.paramInfo = new GoodsParam(
        data.itemParams.info,
        data.itemParams.rule
      );

      // 6.去除评论信息数据
      if (data.rate.cRate !== 0) {
        this.commentInfo = data.rate.list[0];
      }
    });

    // 3.请求推荐数据
    getRecommend().then((res) => {
      this.recommends = res.data.list;
    });

    // 4.给getThemeTopY赋值
    this.getThemeTopY = debounce(() => {
      this.themeTopYs = [];
      this.themeTopYs.push(0);
      this.themeTopYs.push(this.$refs.params.$el.offsetTop);
      this.themeTopYs.push(this.$refs.comment.$el.offsetTop);
      this.themeTopYs.push(this.$refs.recommend.$el.offsetTop);
      // 占位数组最后一位
      this.themeTopYs.push(Number.MAX_VALUE);
    }, 100);
  },
  mounted() {},
  destroyed() {
    this.$bus.$off("itemImageLoad", this.itemImgListener);
  },
  methods: {
    ...mapActions(["addCart"]),
    imageLoad() {
      this.$refs.scroll.refresh();
      this.getThemeTopY();
    },
    titleClick(index) {
      console.log(index);
      this.$refs.scroll.scrollTo(0, -this.themeTopYs[index], 500);
    },
    contentScroll(position) {
      // 1.获取y值
      const positionY = -position.y;
      // 2.positionY和主题中的值进行对比
      let length = this.themeTopYs.length;
      for (let i = 0; i < length - 1; i++) {
        if (
          this.currentIndex !== i &&
          positionY >= this.themeTopYs[i] &&
          positionY < this.themeTopYs[i + 1]
        ) {
          this.currentIndex = i;
          this.$refs.nav.currentIndex = this.currentIndex;
        }
      }
      // 3.返回顶部按钮
      if (positionY >= 1000) {
        this.backFlag = true;
      } else {
        this.backFlag = false;
      }
    },
    backClick() {
      this.$refs.scroll.scrollTo(0, -this.themeTopYs[0], 500);
    },
    addToCart() {
      // 1.获取购物车需要展示的信息
      const product = {};
      product.image = this.topImages[0];
      product.title = this.goods.title;
      product.desc = this.goods.desc;
      product.price = this.goods.realPrice;
      product.iid = this.iid;

      // 2.将商品添加到购物车里
      this.addCart(product).then((res) => {
        // 封装的弹窗插件
        this.$toast.show(res, 1500);
      });
    },
  },
};
</script>

<style scoped>
#detail {
  position: relative;
  z-index: 1000;
  background-color: #fff;
  height: 100vh;
}

.detaik-nav {
  position: relative;
  z-index: 1001;
  background-color: #fff;
}

.content {
  height: calc(100% - 44px - 58px);
}
</style>
